But with a few changes, you could use this for a spa party or anything where pampering or the love of pampering would be involved.

To achieve the smooth look and to make all the "accessories", fondant was used. Before putting the fondant on the cake, be sure to do a smooth "crumb coat" layer. if the cake isn't very smooth, it will show up in the fondant. There is a fondant recipe below for you to use!

Easy Fondant Recipe for a Bathtub Cake

You don't have to make fondant, you can buy it. But for those who want to try their hand at making it, this is what you'll need to make fondant:

1 tablespoon + 2 teaspoons unflavored gelatin

1/4 cup cold water

1/2 cup Glucose (can't find? Try light/clear corn syrup)

2 tablespoons solid vegetable shortening

1 tablespoon Glycerin

Flavoring to taste (For example, Vanilla or Almond)

Any icing color

7 1/2 cups sifted confectioners sugar

How to make fondant:

Combine gelatin and cold water and then let it stand a few minutes until it is thick.

Place mixture in the top of double boiler. Heat and stir until dissolved. Add glucose and mix. Stir in shortening and just before it is completely melted remove mixture from heat.

Add the glycerin, plus any flavoring and color. Cool until lukewarm.

Pour confectioners' sugar into a large bowl and make a well. Pour the lukewarm gelatin mixture into the well a little at a time, and stir with a wooden spoon until no longer sticky. Knead by hand or with a mixer with dough attachment. Knead until the fondant is smooth, easy to work with, and does not stick to your hands.

I suggest the first time you try out the recipe in advance to make sure it works well for you. You can store the fondant in an airtight container at room temperature up to a week and refrigerate if storing longer. When ready to use, knead it again until soft. If you do refrigerate it, let it return to room temperature before kneading. (Do not freeze).

Troubleshooting: If fondant is too soft, add more sugar. If fondant is too stiff or dry, add water or more solid vegetable shortening.

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